Mike Taulty and Mike Ormond just published a series of Silverlight 2 screencasts.
You can access them all at this website: http://www.silverlightscreencasts.com
Of course you will need Silverlight 2 Beta 1 to see the screencasts (and to try out the samples also the SDK and tools available there).
Among the topics covered are:
Basically pretty much you always wanted to know but were afraid to ask about Silverlight 2!!!!